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A 1.6 kg disk with radius 0.63 m is rotating freely at 55 rad/s around an axis perpendicular to its center. A second disk that is not rotating is felled onto the first disk so that their centers align, and they stick together. The mass of the second disk is 0.45 kg and its radius is 0.38 m. What is the angular velocity of the two disks combined?
A baseball pitcher can throw a ball with a speed of 70m/s. He is in the back of a pickup truck that is driving away from you. He throws the ball in the direction, and it floats toward you at a lazy 10 m/s.
an object that is launched straight up from the ground reaches a maximum height h and falls straight back down to the
Consider a thick spherical shell of inner radius R/2 and outer radius R. Calculate the total electrostatic potential energy of the thick shell
My clothes washer spins the wash at a speed of 833rev/min to remove the water. The drum is 21.5 inches in diameter. What is the acceleration of the clothes at the drum
A teenager pushes tangentially on a small hand-driven merry-go-around and is able to accelerate it from rest to a frequency of 15 rpm in 10.0 s. determine the net work performed by the children
A particle with a charge of -60.0 nC is placed at the center of anon conducting spherical shell of inner radius 20.0 cm and outer radius 27.0 cm. The spherical shell carries charge by a uniform density of -2.95 µC/m3. A proton moves in acicular orbit..
A certain string can withstand a maximum tension of 30 Newton without breaking. A kid ties a 250 gram stone to one end of the string. find the speed of the stone when the string breaks
A crate is resting on a ramp that is inclined at an angleabove the horizontal, The coefficient of kinetic frictionbetween the crate and the ramps surface is 0.600. Find the acceleration of the moving crate
Two negative, equally charged drops of water, 0.80 mm apart, exert an electrostatic force of 78.5 x 10-9 N on each other. Determine the net charge on each drop. Give your answer in the form "a.bc" pico-Coulombs.
In a lightning bolt, 15 C of charge flows during a time of 1.5 10-3 s. Assuming that the lightning bolt can be represented as a long, straight line of current, what is the magnitude of the magnetic field at a distance of 30 m from the bolt?
A 3.04 μF capacitor and a 7.84 μF capacitor are connected in series across a 17.0 V battery. What voltage would be required to charge a parallel combination of the same two capacitors to the same total energy?
A spacecraft approaching the earth launches an exploration vehicle. After the launch, an observer on earth sees the spacecraft approaching at a speed of 0.58c and the exploration vehicle approaching at a speed of 0.73c. What is the speed of the explo..
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